*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #fc5d66;
    --secondary-color: #ffc05a;
    --light-color: #f9fafb;
    --dark-color: #272d35;
}

html,
body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-sm {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

.btn {
    display: inline-block;
    padding: 1.3rem 2.3rem;
    border: 1px solid var(--secondary-color);
    border-radius: 32px;
    background: var(--secondary-color);
    color: var(--dark-color);
    cursor: pointer;
    transition: all 0.2s;
}

.btn:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: #fff;
}

/* Text Classes */
.text-primary {
    color: var(--primary-color);
}

.text-secondary {
    color: var(--secondary-color);
}

.section {
    margin: 4rem 0;
}

/* Section Header */
.section-header {
    max-width: 750px;
    margin: 0 auto;
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 1.3rem;
    color: var(--dark-color);
}

.heading-border {
    width: 64px;
    height: 4px;
    background: var(--primary-color);
    margin: 0 auto 2rem;
}

/* Card */
.card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem 1.75rem;
    background: #fff;
    box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.3);
}

/* Navbar */
.navbar {
    background: transparent;
    color: white;
    padding: 1rem 2rem;
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1000;
    transition: background-color 0.5s ease-in-out;
}

.navbar.navbar-scroll {
    background-color: rgba(235, 77, 85, 0.8);
    backdrop-filter: blur(10px);
}

.navbar-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar img {
    width: 81px;
    height: 32px;
}

.navbar .main-menu-list {
    display: flex;
    align-items: center;
    gap: 2rem;
    font-weight: 600;
}

.navbar a {
    color: #fff;
}

.navbar a:hover {
    color: var(--secondary-color);
}

.navbar i {
    font-size: 1.5rem;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
}

.navbar .mobile-menu-toggle {
    color: #fff;
    cursor: pointer;
}

.navbar .mobile-menu-items {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    opacity: 0.95;
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.navbar .mobile-menu-items.active {
    transform: translateX(0);
}

.navbar .mobile-menu-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    font-size: 1.2rem;
}

/* Hero */
.hero {
    background: #000 url('../images/header-background.jpg') center center/cover no-repeat;
    padding: 11.5rem 2rem 8rem;
    color: #fff;
    overflow-x: hidden;
    position: relative;
}

.hero .hero-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 6rem;
    padding-bottom: 8rem;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    line-height: 1.8;
    font-weight: 400;
}

.hero img {
    width: 100%;
    margin-right: -100px;
}

.hero .frame-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
}

/* Learn Topics */
.topics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.topic img {
    transition: transform 0.3s;
}

.topic img:hover {
    transform: scale(1.1);
}

.topic h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

/* Chapter Cards */
.chapter-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 1rem 0 4rem;
}

.chapter-cards img {
    width: 130px;
    margin-top: 1rem;
}

.chapter-cards h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 1rem 0;
}

/* Summary */
.summary {
    background: var(--light-color);
    color: var(--dark-color);
    padding: 4rem 2rem 5rem;
}

.summary .section-lists {
    background: #fff;
    padding: 2rem;
}

.summary .list-header {
    background: var(--primary-color);
    color: #fff;
    padding: 0.5rem 1rem;
    font-size: 1.2rem;
    font-weight: 700;
    margin: 1rem 0;
}

.summary .list-item {
    padding: 1.4rem 0;
    border-bottom: 1px solid #f1f4f6;
}

.summary .list-item:last-child {
    border-bottom: none;
}

/* Info Section */
.info-container {
    background: url('../images/audience.jpg') top center/cover no-repeat;
    display: flex;
}

.info-content {
    background-color: var(--primary-color);
    color: #fff;
    flex: 1;
    padding: 4rem;
}

.info-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.info-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.info-content ul li {
    font-size: 1.2rem;
    line-height: 2;
}

.info-content i {
    margin-right: 0.5rem;
    color: var(--secondary-color);
}

.info-left {
    width: 50%;
}

/* Takeaways */
.takeaways-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 1.5rem 0;
}

.takeaways-cards .card {
    flex-direction: row;
    text-align: left;
}

.takeaways-cards .card i {
    margin-right: 1rem;
}

/* Details */
.details .details-flex {
    display: flex;
    gap: 4rem;
    align-items: center;
    justify-content: center;
}

.details img {
    width: 100%;
    max-width: 500px;
}

.details h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.details .heading-border {
    margin: 0;
}

.details p {
    margin: 1rem 0 2rem;
}

/* Author */
.details+.details .details-flex {
    flex-direction: row-reverse;
}

.details ul {
    margin-bottom: 2rem;
}

.details ul li {
    line-height: 2;
}

.details i {
    margin-right: 0.5rem;
}

/* Stats */
.stats {
    background: #000 url('../images/stats-background.jpg') center center/cover no-repeat;
    color: #fff;
}

.stats-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4rem 2rem;
}

.stats img {
    width: 100%;
    max-width: 500px;
}

.stats-content {
    max-width: 500px;
}

.stats .stats-numbers {
    display: flex;
    gap: 2rem;
    margin: 2rem 0;
    text-align: center;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.stats .stats-numbers h3 {
    font-size: 3rem;
    font-weight: 700;
}

.stats .stats-numbers p {
    font-size: 0.8rem;
}

.stats .stats-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.stats .btn {
    display: block;
    margin: 0 auto;
    text-align: center;
    width: 200px;
}

/* Newsletter */
.newsletter {
    text-align: center;
    margin: 0 2rem;
}

.newsletter-flex {
    display: flex;
    gap: 1rem;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--light-color);
    border: 1px solid #eee;
    padding: 4rem 2rem;
}

.newsletter h2 {
    font-size: 2rem;
    font-weight: 700;
}

.newsletter p {
    max-width: 600px;
}

.newsletter input[type='email'] {
    padding: 1rem 2rem;
    border: 1px solid #ccc;
    border-radius: 32px;
    width: 100%;
    max-width: 400px;
    margin: 1rem 0;
}

/* Social */
.social {
    background: var(--dark-color);
    color: #fff;
    padding: 6rem 2rem;
    text-align: center;
    font-size: 1.7rem;
    margin-bottom: 0;
}

.social a,
.footer a {
    color: #fff;
}

.social a:hover,
.footer a:hover {
    color: var(--secondary-color);
}

.social p {
    margin-bottom: 2rem;
}

.social .social-icons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: #fff;
    border-top: 1px solid #384653;
    padding: 0.5rem 2rem;
}

.footer-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer ul {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

/* Inner Header */
.inner-header {
    background: var(--primary-color);
    color: #fff;
    height: 250px;
    padding-top: 8rem;
}

.inner-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

/* Contact Form */
.contact-form p {
    margin-bottom: 3rem;
}

.contact-form input,
.contact-form textarea {
    display: block;
    font-family: inherit;
    font-size: medium;
    width: 100%;
    margin: 1.5rem 0;
    border: 1px solid #ccc;
    padding: 1.2rem 1rem;
}

.contact-form textarea {
    height: 200px;
}

.contact-form .btn {
    display: block;
    width: 100%;
    font-size: inherit;
    font-family: inherit;
    margin: 0 auto;
}

/* Location */
.location h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.location p {
    margin-bottom: 2rem;
}

.location .map {
    overflow: hidden;
    position: relative;
    height: 0;
    margin-bottom: 3rem;
    padding-bottom: 50%;
    border-radius: 0.25rem;
}

.location .map iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Media Queries */
@media (max-width: 1200px) {
    .hero .hero-flex {
        gap: 2rem;
    }

    .hero img {
        max-width: 500px;
        margin-right: 0;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .topics {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .hero {
        text-align: center;
    }

    .hero .hero-flex {
        flex-direction: column;
        padding-bottom: 4rem;
    }

    .hero img {
        max-width: 600px;
        margin-top: 2rem;
    }

    .topics {
        grid-template-columns: repeat(2, 1fr);
    }

    .chapter-cards,
    .takeaways-cards {
        grid-template-columns: 1fr;
    }

    .details-flex,
    .details+.details .details-flex,
    .stats .stats-flex {
        flex-direction: column;
        gap: 2rem;
    }
}

@media (max-width: 768px) {

    .main-menu-items,
    .info-left {
        display: none;
    }

    .navbar .mobile-menu {
        display: block;
    }

    .navbar .mobile-menu-toggle {
        display: block;
        padding: 10px;
    }

    .info-container {
        flex-direction: column;
    }

    .info-content {
        padding: 2rem;
    }

    .info-content h2 {
        font-size: 1.5rem;
    }

    .info-content p {
        font-size: 1rem;
    }

    .social .social-icons {
        flex-wrap: wrap;
    }

    .social p {
        font-size: 1.2rem;
    }

    .social i {
        font-size: 2rem;
    }

    .footer {
        padding: 0.5rem 1rem;
    }

    .footer-flex {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero {
        padding-right: 0.2rem;
        padding-left: 0.2rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero img {
        max-width: 350px;
    }

    .topics {
        grid-template-columns: 1fr;
    }

    .summary .container {
        padding: 0;
    }

    .stats .stats-numbers {
        flex-direction: column;
    }

    .newsletter h2 {
        font-size: 1.5rem;
    }

    .newsletter p {
        display: none;
    }
}